.px2rem(@name, @px) {
    @{name}: @px / 75 * 1rem;
}
.txh {
    display: flex;
    display: -webkit-flex;
}
header{
    .txh();
    justify-content: space-between;
    align-items: center;
    .px2rem(height,100);
    span:nth-child(1){
        img{
           .px2rem(width,50); 
           .px2rem(height,40); 
           .px2rem(padding-left,40);
        }
    }
    span:nth-child(2){
       .px2rem(font-size,40);
        
    }
}
.main{
    .txh();
    flex-direction: column;
    justify-content: center;
    align-items: center;
    li:nth-child(1){
        img{
            width: 100%;
            .px2rem(padding-bottom,60);
        }
    }
    li:nth-child(2){
        .px2rem(width,480);
        .px2rem(height,70);
        border-radius: 45px;
        border: 1px solid #000;
        background: #1c1c1d;
        .px2rem(font-size,40);
        .px2rem(line-height,70);
        color: white;
        text-align: center;
    }
    li:nth-child(3){
        .px2rem(padding-top,30);
        .px2rem(padding-bottom,20);
        .px2rem(font-size,40);
    }
    li:nth-child(4){
        img{
            .px2rem(width,420);
            .px2rem(height,535);
        }
    }
    li:nth-child(5){
        .px2rem(width,300);
        .px2rem(height,50);
        background: #ffc929;
        text-align: center;
        .px2rem(line-height,50);
    }
}
footer{
    .txh();
    justify-content: center;
    align-items: center;
    .px2rem(height,100);
    .px2rem(margin-left,20);
    background: #202020;
    p{
        .px2rem(font-size,40);
        color: white;
        .txh();
        align-items: center;
        img{
            .px2rem(width,50);
            .px2rem(height,55);
        }
    }
}

